Here's a 1902 film showing Miss Dundee and her Performing Dogs. This film is 110 years old!
It's hard to imagine how this was done since, as we all know, "scientific" dog training was invented just a few years ago, and before that no one knew how to train a dog.
Could this film be a fake? Look carefully. Is that the edge of H.G. Wells' time machine off to the right?